Manufacture of articles from quartz-glass.



JAcos BREDEL; or

HocHsT-oN-THE-MAIN, GERMANY.

MANUFACTURE OF ARTICLES FROM QUARTZ-GLASS.

Specification of Letters Patent.

Patented. April 3, 1906.

Application filed September 19, 1904. Renewed gnS 30, 1905. Serial No. 276,478-

To all whom it. may concern.-

Be it known that I, JACOB BREDEL, a subject of the German Emperor, and a resident of Hchst-on-the-Main, Germany, have invented certain new and useful Improvements in and Relating to the Manufacture of Articles from Quartz-Glass, of which the following is a specification.

This invention has reference to improve ments in and relating to the manufacture of articles from quartz-glass; and it consists in the improved manner or process of manufacture, substantially as hereinafter described.

If the raw material employed consists of rock crystal, broken quartz, or the like, this after being broken into small pieces is heated to a temperature of about 1,000 cent' ade and then immediatel thrown into col water. If quartz-sen silica, or the like be used, this is first melted .at such a suitable temperature as to convert it into a homogeneous mass, which after bein cooled'is broken u into small pieces. T ese pieces are also iieated to a-temperature of about 1,000 cent' ade and, like the broken quartz, quickly coo ed in water. This heatin' and rapid cooling of the material is repeate and the coeflicient of expansion of the resultant material is thereby eatl diminished.

After the mate has een treated as described it is melted and brou ht'to such a sulficiently high temperature t at the metal becomes very fluid, after which a jet of hot air or steam is allowed to pass into it, which transforms the metal into a more or less fibrous or woolly form, the degree of fineness of the fibers depending upon the heat and consequent fluidity of the metal whensubjected to the hotair or steam jet. This 're sultant fibrous or Wooll material is next pressed or molded into 1: e re uired form of the article to be made,.and this is fused to make it revert into a homogeneous mass, the melting bein begun preferably from the bottom, as by tiis means the formation of airbubbles is obviated.

Having now fully described my said invention, what I claim, and desire to secure by Letters Patent, is-' In the manufacture of articles from uartzlass, first converting the raw'materia into a brous or woolly state and then after molding same into the re uired form again melting'it, substantially as escribed.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

JACOB BREDEL. Witnesses:

JEAN GRUND, CARL GRUND.

sis 

